<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
<!--    卡片区域-->
    <el-card>
<!--      添加角色按钮区-->
      <el-row>
        <el-col>
          <el-button type='primary' size='mini'>添加角色</el-button>
        </el-col>
      </el-row>
<!--      角色列表区-->
      <el-table :data='rolelist' border stripe>
<!--        展开列-->
        <el-table-column type='expand'>
          <template slot-scope='scope'>
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key='item1.id'>
<!--              渲染一级权限-->
              <el-col :span='5'>
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
<!--              渲染二级和三级权限-->
              <el-col :span='19'>
<!--                通过for循环 嵌套渲染二级权限-->
                <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key='item2.id'>
                  <el-col :span='6'>
                    <el-tag type='success' closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span='18'>
                    <el-tag v-for="(item3) in item2.children" :key='item3.id' type='warning' closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
<!--        索引列-->
        <el-table-column type='index'></el-table-column>
        <el-table-column label='角色名称' prop='roleName'></el-table-column>
        <el-table-column label='角色描述' prop='roleDesc'></el-table-column>
        <el-table-column label='操作' width='300px'>
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size='mini'>编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size='mini'>删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size='mini' @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
    <span class="dialog-footer">
      <el-button @click="setRightDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="allotRights">确 定</el-button>
    </span>
</el-dialog>
  </div>
</template>

<script>
import { MessageBox } from 'element-ui'

export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: []
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    // 获取所有角色的列表
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
    },
    // 根据Id删除 对应的权限
    async removeRightById(role, rightId) {
      // 弹框提升用户是否要删除
      const confirmResult = await MessageBox.confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      role.children = res.data
    },
    // 分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      // 获取到的权限数据保存到data中
      this.rightslist = res.data
      this.setRightDialogVisible = true
    },
    // 通过递归的方式获取角色下所有三级权限的id，并保存到defKeys数组
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性 则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配成功')
      this.getRoleList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style scoped>
.el-card {
  margin-top: 10px;
}
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.el-table {
  margin-top: 10px;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
